It does require creating a Firefox account and creating a "collection" so it's definitely not out of the box.

I don't think I or my post implied that it was out of the box. You also don't need to create your own collection - one just needs to exist with the extensions you are looking for.

Sure. Wasn't implying anything. Just warning people. It's also why I haven't gotten around to it yet. I've made many accounts with Mozilla over the years and none of them were migrated over to this new system (ditto when they killed off moznet actually). I'm just sick of it. It's just enough friction that I haven't gotten around to fixing the annoyances of the missing addons.

Didn't know about this before. While reading about the process, does this expose publicly what extensions a person uses?

It does. The resulting URL is public and the page shows the creator's username.

https://addons.mozilla.org/en-US/firefox/collections/{Collec...

Or you can just use Kiwi browser, which supports full Chrome extensions.